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Weather

Weather. Weather vs Climate. Weather Day to day happenings Ex: Raining Can change daily/weekly. Climate Annual trends Tropical Temperate Polar. Electromagnetic Energy. The type of energy from the Sun Can travel through a vacuum (space) Transfer of energy through radiation

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Weather

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  1. Weather

  2. Weather vs Climate • Weather • Day to day happenings • Ex: Raining • Can change daily/weekly • Climate • Annual trends • Tropical • Temperate • Polar

  3. Electromagnetic Energy • The type of energy from the Sun • Can travel through a vacuum (space) • Transfer of energy through radiation • Examples: • Visible light • Microwaves • Radio Waves • Ultraviolet light

  4. eesc.columbia.edu

  5. acecrc.sipex.aq

  6. Winds • Movement of air • Speed measured with anemometer • Caused by: • Radiant heating from electromagnetic energy • Air convection currents • Difference in air pressure • Unequal heating of the atmosphere

  7. weatherquestions.com

  8. learn.uci.edu

  9. Local Winds • Unequal heating of the Earth • Low pressure forms under rising hot air • Land next to a body of water • Land breeze • Sea breeze • Only form when winds not blowing from farther away

  10. free-online-private-pilot-ground-school.com

  11. Global Winds • Global convection currents • Coriolis Effect • Earth’s rotation makes winds curve to the right in Northern Hemisphere and curve left in Southern Hemisphere • Kinds: • Prevailing Westerlies • Polar Easterlies • Trade Winds • Jet Stream

  12. geology.wmich.edu

  13. Water in the Atmosphere • Humidity • Relative Humidity • Dew Point • Liquid water is condensed on the surfaces • Frost • Where solid water is deposited on surfaces

  14. jeffcogardener.blogspot.com

  15. Clouds • A visible mass of water or ice suspended in the atmosphere • Types • Cumulus – heap or mass • Stratus – layered • Cirrus – wispy, feathery • Can add nimbus (means rain) • Cumulonimbus • Nimbostratus

  16. Cumulus usatoday.com

  17. wattsupwiththat.com

  18. Stratus urbanext.illinois.edu

  19. Cirrus imagescloud.com

  20. Cumulonimbus westphalfamily.com

  21. pangea.tec.selu.edu

  22. Precipitation • When water falls to the Earth • Temperature of the air determines the amount of water cloud can hold • Types • Rain • Snow • Sleet • Hail • Freezing rain

  23. Rain Shadow biorlz.info

  24. Air Masses • Classified by Temperature and Humidity • Temperature • Tropical – Warm • Polar - Cold • Humidity • Maritime – Humid • Continental - Dry

  25. North American Air Masses faculty.uml.edu

  26. Fronts • Where air masses meet but do not mix • Can be 15 – 200 km wide (9 mi – 124 mi) • Can reach 10 km into troposphere

  27. Cold Front • Fast moving cold air runs into slow moving warm air • Rain at front – Rising warm air looses water as it cools • Move quickly • After front passes dry, cool and clear http://www.physicalgeography.net

  28. Warm Front • Warm air advances on cold air • Slower than cold front • Clouds, maybe rain physicalgeography.net

  29. Stationary Front • Not enough force for each front to move the other • Warm air pushed up and then cools = precipitation cbs3springfield.com

  30. Occluded Front • Warm air caught between two cold air masses • Warm air pushed up and cools = precipitation physicalgeography.net

  31. Pressures • High • Anticyclone • Rotate clockwise (Northern Hemisphere) • Winds move outward • Cool, drier, clearing air • Low • Cyclone • Rotate counterclockwise (Northern Hemisphere • Winds move inward • Warm, moist air

  32. myweb.cwpost.liu.edu

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